Four-wheeled motorcycle



FIG. 1 is a front elevation view of a four-wheeled motorcycle showing our new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is an elevation view of the left side thereof;

FIG. 4 is an elevation view of the right side thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a perspective view thereof. 

The ornamental design for a four-wheeled motorcycle, as shown. 